<%@ page contentType="text/html;charset=UTF-8" language="java"
         pageEncoding="UTF-8" %>
<html>
    <body bgcolor=yellow>
<%! double a=3,b=4,c=5;%>
<BR>加载 triangle.jsp 计算三边为<%=a%>,<%=b%>,<%=c%>的三角形面积：
<jsp:include page="triangle.jsp" flush="true">
<jsp:param name="sideA" value="<%=a%>" />
<jsp:param name="sideB" value="<%=b%>" />
<jsp:param name="sideC" value="<%=c%>" />
</jsp:include>
</body>
</html>
